package com.aaa.affair.service;

/**
 * @Author: whj
 * @Version 1.0
 * @Date: 2022/11/14  17:00
 */
public interface BookShopService {
    /**
     * 购买图书
     * @param isbn 图书编号
     * @param username 账户名
     */
    public void purchase(String isbn,String username);
}
